UA40344U - Safety appliance for needle of intravenous catheter - Google Patents

Abstract

A safety appliance for the needle of the intravenous catheter contains the support element allowing the needle for positioning between the opposite clamps connected with the support element. The clamps move between the positions in which they are driven apart, wherein they are interacting with the block inside the vaned casing of the device of the intravenous catheter. When the needle passes the clamps, the latter interlock near the point of the needle preventing the displacement of the needle relative to the support element.

Description

According to another feature of this utility model, the needle safety device is installed with the needle safety device abutting the catheter support member.

Preferred embodiments of the utility model are explained in the following description and in the accompanying drawings.

Fig. 1 is a top view of an intravenous catheter device.

Fig. 2 is a section of the device shown in Fig. 1, along line 2-2.

Fig. 3 is an enlarged view of section C in the section shown in Fig. 2.

Fig. ZA is an alternative embodiment of the needle safety device shown in Fig. 3.

Fig. 4 is a top view of an intravenous catheter device with a needle partially pulled out of the catheter and winged body.

Fig. 5 is a side view in section along line 5-5, in Fig. 4.

Fig.b is a top view of the intravenous catheter device with the needle withdrawn from the catheter and the needle withdrawn from the position between the clamps of the safety device for the needle.

Fig. 7 is a side view in section along the line 7-7 in Fig. 6.

Fig. 8 is an enlarged view of section 8 in the section shown in Fig. 7.

Fig. 8A is an alternative embodiment of the needle safety device shown in Fig. 8.

Fig. 9 is an enlarged cross-section of an alternative embodiment of a safety device for a needle containing an extended needle and a tension ring with clamps in the open position.

Fig. 10 is a safety device for the needle, shown in Fig. 9, with clamps in the closed position.

Fig. 11 is a top view of an intravenous catheter device with a needle pulled from the catheter and a winged body.

Fig. 12 is a side view in section along the line 9-9, in Fig. 10.

Fig. 13 is a safety device for a needle, shown in Fig. 8, with a link connecting clamps.

Fig. 13A is a safety device for the needle, shown in Fig. 8A, with a link connecting the clamps.

Figure 1 shows a device 10 of an intravenous (IM) catheter according to this technical solution.

The IM catheter device is shown as a finished product before use and includes a needle cap 12, a winged body 14, a port cap 16 in a self-contained unit with a winged body 14, and a needle sleeve 18 mated to the winged body 14.

As can be seen in the section in Fig.2, the needle 20 continues from the sleeve 19 of the needle through the winged body and ends with the tip 22 of the needle under the cap 12 of the needle.

The needle 20 is hollow, and the tip 22 of the needle is usually bevelled. As the needle tip 22 is inserted into the patient, the needle may encounter fluid pressure that passes through the needle tip 22, down the needle 20, and into the expansion chamber 24.

The needle is surrounded by a catheter 26, which is connected to the winged body 14 by means of a supporting part 28 of the catheter. Catheter 26 is a flexible tube that must remain in the user to provide fluids, nutrients, or medications.

Figure 3 is an enlarged view of the needle safety device 40 shown in Figure 2.

The needle sleeve 18 contains a mating bore 30, which serves to fix the safety device 40 for the needle in a given position inside the vane body 14. The winged body 14 contains a chamber 32 of the vane body, in which the safety device for the needle is located. In the chamber 32 of the vane body there is an obstacle 34 which interacts with the safety device 40 for the needle. In the illustrated embodiment, the obstacle 34 is an annular projection.

The supporting part of the catheter continues into the winged body and abuts against the safety device 40 for the needle. As shown, the safety device 40 for the needle is securely fixed in a given place in the mating bore and support part 28 of the catheter.

The safety device 40 for the needle includes a support part 42, inside which there is a channel 44 for the needle. The needle safety device 40 also includes a reverse collet 46 that serves to push apart to abut against the obstacle 34 and to compress to bypass the obstacle 34 .

The reversing collet includes two clamps 48 capable of moving between an extended position with the effective outer diameter of the clamps increased when the needle 20 is between the clamps 48. The clamps move from an extended position to a compressed position when the needle 20 is no longer between the clamps 48. Clamps 48 interact with the obstacle 34 to enable the needle 20 to move relative to the support portion 42 of the safety device 40 for the needle. The clamps 48 allow said relative movement when in the extended position, as can be seen from a sequential view of Figs. 2, 5, 7 and 10.

As the needle 20 exits the clamps 48, the clamps close around the tip 22 of the needle and thereby prevent accidental contact of the medical worker with the tip 22 of the needle. The clamps 48, when closed around the tip of the needle, block movement of the needle 20 relative to the support portion 42 of the safety device 40 of the needle, because the clamps 48 pass the obstacle 34 without the tension effect of the obstacle 34 on the safety device 40 for the needle. The safety device 40 for the needle must be held in place by an obstacle so that the needle 20 moves relative to the safety device 40 for the needle. The needle channel 44 in the needle safety device 40 has a coefficient of friction that provides capture of the needle 20 when the needle safety device 40 is not held in place by the obstacle 34 .

As can be seen from the enlarged views of Figs. 3, 3A, 8 and 8A, the clamps 48 have a slope 50. During assembly, the needle safety device 40 is usually installed on the needle 20 at the end attached to the needle hub 18, and then the end is secured in sleeves 18 needles. Thus, the needle safety device 40 is advanced before being inserted into the winged housing 14. When the needle is inserted into the catheter, the needle safety device 40 is inserted into the winged housing until it contacts the obstacle 34. The bevel 50 is gradually moved past the obstacle 34 and then installed through the obstacle with the tactile signal, which is clearly defined by the compiler. The side 52 opposite the slope 50 prevents the needle safety device 40 from moving back after it is set in place behind the obstacle 34 .

Clamps 48 are interconnected by at least one link 49 (Figs. 13 and 13A) in the area between the support part 42 and the slope 50. The link can be provided only on one side of the clamps 48. Alternatively, the first and second links can be provided on opposite sides clamps 48. At least one link is formed to have spring properties so that the clamps 48 can be deployed against the action of the turning force of the link. For example, a link can have a curvilinear shape, for example, a 5- or 2-shaped shape. Alternatively, the link may have a substantially rectilinear shape.

The support part 42, the clamps 48 and, preferably, also at least one link can be formed into a single unit and, preferably, made of a plastic material, for example, by injection molding. Alternatively, the support part 42, the clamps 48 and preferably also at least one link can be made of a metallic material.

A return cone 54 is provided on the clamps 48. This return cone 54 engages the point of the needle 22 and, thereby, prevents the passage of the point of the needle 22 past the return cone 54. As can be seen from the comparison of figures C and ZA, the return cone 54 can be located on one or both clamps 48.

As can be seen in Fig.9 and 10, in the safety device 40 for the needle can be used extended needle 23 and the tension ring 53 to hold the safety device 40 for the needle in a safety connection with the tip 22 of the needle. The needle 20 has an extension located near the tip 22 of the given needle so that the effective diameter of the given needle increases near a given particular point. Extensions 23 are created during assembly after the safety device 40 for the needle is installed on the needle 20, which is attached to the sleeve 18 of the needle. The extension 23 provides an obstacle for tightening the safety device 40 for the needle after the tip 22 of the needle is enclosed in the safety device 40 for the needle. In addition, the clamps are provided with a tension ring 53 which will cause the clamps to be forcibly compressed as soon as the tip 22 of the needle moves past the front of the clamps 48 when the needle is withdrawn from the catheter 26 after use.

In use, the medical professional obtains an intravenous (IM) catheter device with a protective needle cap 12 as shown in Figures 1 and 2, and the needle 20 and catheter 26 are inserted into the patient's vein. As shown in Figures 4 and 5, the needle is then withdrawn from the patient by grasping the winged body 14 and pulling the sleeve 18 of the needle.

The needle 20 slides through the catheter 26 and the safety device 40 for the needle.

The tip 22 of the needle bypasses the clamps 48, which allows the clamps to compress into their natural position. Alternatively, the tension ring 53 on the clamps 48 causes a forced compression of the clamps 48. In the natural position of the clamps, they can pass the obstruction 34 in the vane housing 14. Alternatively, the needle safety device 40, as shown in Figs. 8 and 3A, can weakly contact with an obstacle 34; however, the clips 48, which are made of a flexible material and are no longer restrained by the metal needle 22 of the syringe, are able to bend slightly to pass the obstruction 34. In this scenario, the needle channel 44 in the support portion 42 captures the needle 20 securely enough to pass the clips 48 past the obstruction 34. Alternatively, the extension 23 shown in Fig. 9 does not pass inside the needle channel 44, but allows the clamps 48 to pass the obstruction 34.

As shown in Fig.9 and 10, the medical worker then completely withdraws the safety device 40 for the needle from the winged housing 14 for elimination. The device protects the medical worker from an accidental injection with the tip of a 22 needle.

The safety device 40 for the needle remains in its assembled position, shown in Fig. 1, without affecting the operation and functioning of the device 10 IM-catheter, due to the fact that the profiled rear section of the support part 42 is seated in the mating bore 30 of the needle sleeve. When the support part 42 is in the docking bore 30, the clamps are always guaranteed to be located in a plane parallel to the needle 20, so that the needle 20 can properly move between the clamps 48 and ensure the correct functioning of the safety device 40 for the needle.

After entering the safety device 40 for the needle, the tip 22 of the needle does not come out, even in the case of being pressed against the medical worker, work surface or other object. Once the needle safety device 40 is in place, the needle 20 can be safely disposed of. not

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